Since the headlights are off the car now, decided to get rid of the extremely annoying "milky" look. Although it was nothing to worry about, it drove me nuts. Not very well seen on the picture, though:

So I started with sandpaper grit 600:

Then grit 1200:

And, finally, grit 2000. Not sure it was absolutely necessary since I could see no difference between 1200 and 2000 but I did it nevertheless. After grit 2000, used an alumina-based commercial polishing product :

After polishing, used the wax from the kit:

And the final result:

You should count not less than 10 minutes per grit. I worked by hand, maybe if you use a vibro-polisher it would take way les time. After every grit, wipe carefully the surface and check for deep scratches left from the previous stages. Remove them by further sanding. Remember: sanding is the most critical stage! Failing to do it properly will result in visible scratches even after polishing, so be meticulous!
For polishing I used a general-purpose drill with variable rpms. This stage takes a bit more than 2-3 minutes and is very easy, there are very few things that can go wrong there.
If you have deep scratches on your headlights, start from grit 240 or so and continue the same way as described.

Just installed the alarm retrofit kit (without interior protection).
Part # 65 73 0 302 424 $112r
Initially wasn't going to add it, but an experience in VA on the way to HC changed my mind.

Basically a under hood switch and a siren with built in tilt sensor.
The siren assembly gets installed underneath the car between the two mufflers.
Instructions say you have to remove the rear bumper cover to do that.
Having the car apart before, that didn't make sense.
Turns out that you just have to remove (8 screws and 2 plastic nuts) the black bottom diffuser
plastic piece cover which gives you the same access that removing the bumper does.

This thread is NOT for questions. This thread is to post DIY or How-To's. If you have a question about your car, please start a new thread. Do NOT post your question here. Your post will be deleted in the interest of keeping this thread on topic.

If you have a question about a DIY posted here, feel free to ask away here or int he original thread.

I bought a complete steering column for a Z4 2008, 3.0si. After I received it I took it to a European Garage. They looked at the steering and said they couldn't satisfactorily install it since they did not put in"a Locking Key" before its removal. He told me to return it. My question is are they right that it can not be satisfactorily installed. Please advise

I bought a complete steering column for a Z4 2008, 3.0si. After I received it I took it to a European Garage. They looked at the steering and said they couldn't satisfactorily install it since they did not put in"a Locking Key" before its removal. He told me to return it. My question is are they right that it can not be satisfactorily installed. Please advise

Please start your own thread with this question. This entire section is ONLY for DIY items. Not questions.